Spring shade-roller



(No Model?) Y I p Jr@xfMoRcHx-L SPRING SHADE ROLLER.

' Patented MarJl, 1884.

I WlNgssgs.- e INI/ENTOR/ c Hole/V52 v the downward movement of the shade and to of Pennsylvania, have invented certain new UNITED STATES i PATENT OFFICE.

ABBOTT'MOBGAN, OF PHILADELPHIA, PENNSYLVANIA.

SPRING SHADE-ROLLER.

SPECIFICATION- forming part of Letters Patent No. 294,494, dated March 4, 1884.l

Application filed April 2, 1883. (No model.)

To all w/wm t may concer-n.: Y

Be it known that I, ABBOTT MORGAN, a citizen ofthe United States, residing at Philadelphia, in the county of Philadelphia and State and useful Improvements in Spring Shade- Bollers, of which the following is a specification, reference being had therein Yto the accompanying drawings, wherein- Figure 1 is a broken longitudinal section of a shade-roller embodying my invention, and Figs. 2 and 3 are transverse sections.

My invention has relation to balanced spring shade-rollers, having'especial reference to that forni of such rollers wherein are employed a disk on the spindle for obtaining the desired friction on-the roller when'the shade is descending or the spring is being wound up, and a cylinder or ball fitting in a tapering recess in said disk for locking the spring to prevent it unwinding when the rolleris removed from the brackets; and it has for its object to so construct such disk and the locking -device that the latter serves the double purpose of affording the requisite friction for the roller upon lock the spring when the roller is taken out. of the brackets.

My invention accordingly .consists of the novel construction and arrangement of the parts as hereinafter speci'cally described and claimed, having reference particularly to the provision of a shade-roller spring-balanced, having a true or circular disk secured to the spindle, a tapering recess in the periphery of the disk, and an elongated tapering cam seating in said slot so as to impinge upon or contact with a washer secured in' an annular recess or socket in the end of the roller.

In the drawings, A represents a shade-roller having a spindle, B, with angular end b and spiral spring D, connected in the well-known` or other desirable manner, to form a balanced spring shade-roller, and need not, therefore, be more particularly described. The end a of roller A is formed with an annular socket, a', into which is driven a bushing or washer, O. Upon the spindle B is secured a true or circular disk, E, having a peripheral tapering re cess, c, which receives a correspondinglyshaped cam, F, or one of an elongated and tapering configuration, as illustrated. The outer edge, f, of said cam-is of the same curve vas that of the innerv periphery, c', of washer O, s0 that when said cam is in its normal position, or in the recess' e, as shown 1n Fig. 2,

vits edge f, from end to end, impinges upon or ment with cam F and relieves the friction between said parts during the ascent of the shade.

When theroller is removed from the brackets, the initial unwinding of the spring rotates y the disk E in the direction indicated by the arrow in Fig. 3, and causes cam F to move or jump out of the recess'e and wedge itself between said disk and washer, as illustrated in said gure, t0 lock the spring `or prevent further unwinding of the same. If desired, the washer C may be dispensed with and the cam F arranged or enlarged to bear against the bore of the roller.

It will be observed froml the foregoing that the cam F serves both for afriction device for the roller and for a lockv for the spring.

' l. In'a spring shade fixture or roller, acircular or true spindle-disk, E, having tapering recess e, elongated tapering cam F, and roller A, substantially as set forth. i

2. In a spring shade-roller, a circular or true spindle-disk E, having tapering recess e, elongated tapering cam F, and washer C, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

ABBOTT MORGAN.

Witnesses:

S. .IVAN STAvoREN, CEAS. F. VAN HORN. 

